136621430402 has 4 divisors (see below), whose sum is σ = 204932145606. Its totient is φ = 68310715200.

The previous prime is 136621430401. The next prime is 136621430443. The reversal of 136621430402 is 204034126631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 125655361441 + 10966068961 = 354479^2 + 104719^2 .

It is not an unprimeable number, because it can be changed into a prime (136621430401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34155357599 + ... + 34155357602.

Almost surely, 2^136621430402 is an apocalyptic number.

136621430402 is a deficient number, since it is larger than the sum of its proper divisors (68310715204).

136621430402 is an equidigital number, since it uses as much as digits as its factorization.

136621430402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68310715203.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 136621430402 in words is "one hundred thirty-six billion, six hundred twenty-one million, four hundred thirty thousand, four hundred two".